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National Grid moves 300t transformer units across Kent

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Two new 318t transformers have been transported to National Grid’s Sellindge substation from the Port of Dover in overnight operations involving a specialised dual-truck vehicle.

The two new transformers were delivered to the Port of Dover in early January, and have been successfully transported across Kent on a specialised dual-truck vehicle capable of carrying the incredible weight.  

The transformers, built by Siemens, are to be installed at the National Grid substation at Sellindge, and will supply power to homes across the south east. 

Each transformer is the size of a house, and was carried on a special vehicle measuring 87m long and 5.8m wide.  

The size of the transformers mean that they required two trucks to move it, one at the back and one at the front.

The dual-truck system used to move the huge cargo travelled up to 19km per hour, hence the decision to move at night to minimise disruption to local traffic.  

National Grid project engineer Phil Billington said: “Millions of people rely on us to supply their electricity without interruption, day in, day out and so it’s important that we keep our substations and the equipment in them working efficiently.”  

“We planned every detail of the transformer deliveries to make sure we minimise disruption to local people.” 

The route for the transformers exited the Port of Dover at Union Street and traveled along the A20 to the Alkham Valley Road junction (A260 – Canterbury Road).  They then continued along the A259 (Churchill Avenue) to access the M20 at junction. Each load exited the M20 at junction 9 and re-join it to travel back to junction 10. This was due to a weight restriction at this junction. The transformers then left the M20 at junction 10, travelling along the A20 and Church Lane before reaching Sellindge substation. 

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